. >> 25-year-old dan yany bartel picked up the violin two years ago. he started with "violin for dummy" book and before this class had given up. >> i was having a hard time with "mary had a little lamb." the guys around me said listen the you don't cut that out, i'm going to break it. they hated me. >> these days when he gets angry or frustrated he picks up his instrument. he's among 16 students hand selected from a prison population of 1,600. >> it's hard to believe that someone who could one day stick a gun in someone's face could really be transformed by music. >> mm-hmm. >> should people believe that? >> i thank should because it happened. >> you're going to find notes that you love. >> it happened in part by learning to read and write their own music. >> a bit of freedom, they say, in a place where that's rare. >> as the workshop ss, they work to perform the pieces. dennis martinez wrote a song called "dear mother." which he practiced with professional singer leanne westover. >> i always had a creative ink ling, but i used to take this energy and